From e18712e10fa31c7c8b4c6178edfc75eef0b8fb90 Mon Sep 17 00:00:00 2001 From: Adam Strzelecki Date: Thu, 12 Jun 2014 19:46:50 +0200 Subject: [PATCH] FindCUDA: Fix compilation with Clang on OSX When setting default CUDA_HOST_COMPILER we must dereference CMAKE_C_COMPILER, i.e. /usr/bin/clang should be used instead /usr/bin/cc which is symlink. Otherwise CUDA thinks it is GCC and issues -dumpspecs which is unknown option to Clang. Also we need to ensure CMAKE_C_COMPILER is defined, which can be a case when project specifies CXX language only. --- Modules/FindCUDA.cmake | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/Modules/FindCUDA.cmake b/Modules/FindCUDA.cmake index d9809ad..7c72f5e 100644 --- a/Modules/FindCUDA.cmake +++ b/Modules/FindCUDA.cmake @@ -452,7 +452,14 @@ set(CUDA_NVCC_FLAGS "" CACHE STRING "Semi-colon delimit multiple arguments.") if(CMAKE_GENERATOR MATCHES "Visual Studio") set(CUDA_HOST_COMPILER "$(VCInstallDir)bin" CACHE FILEPATH "Host side compiler used by NVCC") else() - set(CUDA_HOST_COMPILER "${CMAKE_C_COMPILER}" CACHE FILEPATH "Host side compiler used by NVCC") + # Project may not set C language, enabling it here since it is used by NVCC. + if(NOT CMAKE_C_COMPILER AND NOT CUDA_HOST_COMPILER) + include(CMakeDetermineCCompiler) + endif() + # Using cc which is symlink to clang may let NVCC think it is GCC and issue + # unhandled -dumpspecs option to clang. + get_filename_component(c_compiler_realpath "${CMAKE_C_COMPILER}" REALPATH) + set(CUDA_HOST_COMPILER "${c_compiler_realpath}" CACHE FILEPATH "Host side compiler used by NVCC") endif() # Propagate the host flags to the host compiler via -Xcompiler -- 1.8.5.2 (Apple Git-48)